It's every parent's nightmare. Your teenager gets heavily involved in drugs, and you don't even know it's happening.
In the first of our new series from Fixers - the campaign that helps young people make a difference - we meet teenager Jade Clement who says cannabis nearly ruined her school career, and cut her off from family and friends.
With government figures showing that nearly a third of young people have tried cannabis, and new research suggesting it may damage teenagers' brains, she's warning that the drug is no joke.
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